Live data from Hacker News

Ask HN: What are you working on? (October 2025)

news.ycombinator.com

351–360 of 1001 posts

Re: Ask HN: What are you working on? (October 2025)

#351
I’m building Skim: https://www.justskim.in/, A PWA that lets you read books as auto-swiping, short-form content on mobile. I use it to replace watching YouTube Shorts or Instagram with reading in the same form factor. It works offline and is entirely client-side.

This weekend I’m working on making the parsing more robust. The most common friction I’ve heard is that downloading books elsewhere and importing them into the app is distracting. I’m torn between expanding it to include a peer-to-peer book exchange or turning it into an RSS feed reader.

Re: Ask HN: What are you working on? (October 2025)

#353

I'm playing around with sandboxing techniques on Mac so I can isolate AI tools and prevent them from interacting with files they shouldn't have access to -- like all my dotfiles, AWS credentials, and such. I've created two open-source solutions, one which uses a VM ( https://github.com/webcoyote/clodpod ) and another which creates a limited-user account with access to a shared directory ( https://github.com/webcoyote…

Have you considered using docker? Seems possibly more lightweight than a VM with more isolation than a user account based method.

My gripe with docker vs native code is docker is just slow to build. or maybe im just not using it right.

Re: Ask HN: What are you working on? (October 2025)

#354
I’ve been building proficiency with quantum optics equipment. Repeating classic quantum entanglement experiments like the quantum eraser [0] and violating the CHSH inequality (which won the 2022 Nobel). I’m working towards a novel quantum eraser variant.

[0] https://github.com/paul-gauthier/entangled-pair-quantum-eras...

Re: Ask HN: What are you working on? (October 2025)

#355

I’m currently building YTVidHub—a tool that focuses on solving a very specific, repetitive workflow pain for researchers and content analysts. The Pain Point: If you are analyzing a large YouTube channel (e.g., for language study, competitive analysis, or data modeling), you often need the subtitle files for 50, 100, or more videos. The current process is agonizing: copy-paste URL, click, download, repeat dozens of t…

I did consider building a tool like this before I pivot to something else. I'm learning materials in Chinese Mandarin language from a YouTube playlist. NotebookLLM doesn't support Chinese language yet so you must make sure your app supports Chinese Mandarin so I can use it. :) A way to find specific materials would be nice. Think of converting the whole playlist into something like RAG then you can search anything fr…

Wow, thanks for this validation! Hearing from someone who almost built the solution themselves confirms we’re on the right track.

You hit the nail on the head regarding language support.

Mandarin/Multilingual Support: Absolutely, supporting a wide range of languages—especially Mandarin—is a top priority. Since we focus on extracting the official subtitles provided by YouTube, the language support is inherently tied to what the YouTube platform offers. We just need to ensure our system correctly parses and handles those specific Unicode character sets on the backend. We'll make sure CJK (Chinese, Japanese, Korean) languages are handled cleanly from Day 1.

The RAG/Semantic Search Idea: That is an excellent feature suggestion and exactly where I see the tool evolving! Instead of just giving the user a zip file of raw data, the true value is transforming that data into a searchable corpus. The idea of using RAG to search across an entire playlist/channel transcript is something we're actively exploring as a roadmap feature, turning the tool from a downloader into a Research Assistant.

Thanks for the use case and the specific requirements! It helps us prioritize the architecture.

Re: Ask HN: What are you working on? (October 2025)

#356
post #310

My on again, off again life's work has been a foss dev stack for interactive tutoring systems. Something like a general purpose Math Academy, with mechanics to permit UGC and courses that are both adaptive (to the user's background and demonstrated skill) and inter-adaptive (to the userbase's expressed priorities). http://github.com/patched-network/vue-skuilder , docs-in-progress at https://patched.network/skuilder I…

Tried the email list. Got an error.

Very interested in this sort of stuff.

Re: Ask HN: What are you working on? (October 2025)

#357
This one's going to be out of left field, but last Thursday I launched Countdown Treasure (https://countdowntreasure.com)

It's a real life treasure hunt in the Blue Ridge Mountains with a current total prize of $31,200+ in gold coins and a growing side pot.

I modeled it off of last year's Project Skydrop (https://projectskydrop.com) which was in the Boston area.

* Shrinking search area (today, Day 5, it will be 160 miles, on Day 21 it'll be just 1 foot wide)

* 24/7 webcam trained on the jar of gold coins sitting on the forest floor just off a public hiking trail

* Premium upgrades ($10 from each upgrade goes towards the side pot) for aerial photos above the treasure and access to a private online community (and you get your daily clues earlier)

* $2 from each upgrade goes towards the goal of raising $20k for continued Hurricane Helene relief

So far the side pot is $6k and climbing.

It's been such a fun project to work on, but also a lot of work. Tons of moving parts and checking twice and three times to make sure you've scrubbed all the EXIF data, etc.

Re: Ask HN: What are you working on? (October 2025)

#358
post #343

Working on an dedicated offline space. Screen device are stored to a locker. Serves coffee and beverages and light food. (There will be a small separate space for occasional screen/internet access in case of need) I've been working on the idea for about a year now. I have put up the funds and set up the corporation. Been busy designing the menu, scouting an ideal location and finding the right front-end staff.

This sounds like my retirement plan: coffee shop + book store. I tend to buy old engineering and mathematics textbooks (my collection has suffered losses through multiple moves, unfortunately) and I find that these are typically overlooked at normal bookstores and even libraries.

Reminds me of Ada's Technical Books and Cafe in Seattle

Re: Ask HN: What are you working on? (October 2025)

#359
I've been working to build some tools for detecting and monitoring lookalike domains - the kinds of things used in phishing / brand impersonation attacks.

My current prototype scans potential lookalikes for a target domain and then tracks DNS footprint over time. It's early, but functional - and makes it easier to understand if some lookalike domain is looking more "threat-y".

I've also been working on automating the processing of a parent-survey response for my kid's school using LLMs. The goal is to produce consistent summarization and statistics across multiple years and provide families with a clearer voice and helping staff and leadership at the school best understand what things have been working well (and where the school could improve).

Re: Ask HN: What are you working on? (October 2025)

#360

I vibe coded a desktop app to view Indian stocks: https://github.com/brainless/Indistocks This is built with Rust, egui and SQLite3. The app has a downloader for NSE India reports. These are the daily end of day stock prices. Out of the box the app is really fast, which is expected but still surprises me. I am going to work on improving the stocks chart. I also want to add an AI assisted stocks analyst. Since all the…

This is impressive, inspirational.
Post reply on HN